kjjb - thank you for taking the trial. Image display depends on lots of factors including the firewall settings, your carrier and APN settings & the actual url of the image itself. Since you are on Std. version - make sure you have the correct APN set for your carrier and network. Try switching on the 'Force TCP/IP' under Empower Options > Advanced.
After you are done trial of Empower Std. I will also suggest you to try out the Empower Mail Viewer Pro. It has a far advanced support for image display and way faster viewing capabilities - there is absolutely no delay in opening the email.